<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	</body>
</html>
<script type="text/javascript">
	let arr = [
		{
			a: 1111
		},
	]
	arr = arr.map((item, index)=>{
		item.symbol = Symbol(index)
		return item
	})
	console.log(arr);
</script>